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The health situation in Japan after World War II was extremely poor. However, in less than 35 years the country's life expectancy was the highest in the world. Japan's continuing health gains are linked to policies established at the end of World War II by the Allied occupation force that established a democratic government. The Confucian principles that existed in Japan long before the occupation but were preempted during the war years were reestablished after the war, facilitating subsequent health improvements. Japan's good health status today is not primarily the result of individual health behaviors or the country's health care system; rather, it is the result of the continuing economic equality that is the legacy of dismantling the prewar hierarchy.

We explored the effects on health of both household asset inequality and political armed conflict in Sudan. Using the 2010 Sudan household survey, we evaluated the role of both household asset distribution (measured by the Gini coefficient) and armed conflict status at the state level. We measured associations with six health-related outcomes: life expectancy, infant mortality, height-for-age (stunting), adequacy of food consumption, teenage birth rates and vaccination coverage for young children. For each of six measures of health in Sudan, outcomes were significantly worse in the states with more unequal asset distribution, with correlation coefficients ranging between -0.56 (stunting) and -0.80 (life expectancy). Conflict status predicted worse outcomes. Wealth redistribution in the more unequal states, as well as a political resolution of conflict, may improve population health.

Public health in the early 21st century increasingly considers how social inequalities impact on individual health, moving away from the focus on how disease relates to the individual person. This 'new public health' identifies how social, economic and political factors affect the level and distribution of individual health, through their effects on individual behaviours, the social groups people belong to, the character of relationships to others and the characteristics of the societies in which people live. The rising social inequalities that can be seen in nearly every country in the world today present not just a moral danger, but a mortal danger as well. Social inequality and public health brings together the latest research findings from some of the most respected medical and social scientists in the world. It surveys four pathways to understanding the social determinants of health: differences in individual health behaviours; group advantage and disadvantage; psychosocial factors in individual health; and healthy and unhealthy societies, shedding light on the costs and consequences of today's high-inequality social models. This exciting book brings together leaders in the field discussing their latest research and is a must-read for anyone interested in public health and social inequalities internationally